Hub (Noun)
Meaning 1
The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes.
Classification
Nouns denoting man-made objects.
Hypernyms
Meaning 2
A center of activity or interest or commerce or transportation; a focal point around which events revolve; "the playground is the hub of parental supervision"; "the airport is the economic hub of the area".
Classification
Nouns denoting spatial position.